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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
4a2a8b5a LP |
2 | |
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
4a2a8b5a LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
4a2a8b5a | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
4a2a8b5a LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <stdio.h> | |
23 | #include <getopt.h> | |
24 | #include <error.h> | |
25 | #include <errno.h> | |
26 | #include <unistd.h> | |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
29 | ||
81527be1 LP |
30 | #include <systemd/sd-daemon.h> |
31 | ||
4a2a8b5a LP |
32 | #include "strv.h" |
33 | #include "util.h" | |
34 | #include "log.h" | |
1bc5d57a | 35 | #include "sd-readahead.h" |
9aac0b2c | 36 | #include "build.h" |
4d1a6904 | 37 | #include "env-util.h" |
4a2a8b5a LP |
38 | |
39 | static bool arg_ready = false; | |
40 | static pid_t arg_pid = 0; | |
41 | static const char *arg_status = NULL; | |
96551bae | 42 | static bool arg_booted = false; |
6624768c | 43 | static const char *arg_readahead = NULL; |
4a2a8b5a LP |
44 | |
45 | static int help(void) { | |
46 | ||
2e33c433 | 47 | printf("%s [OPTIONS...] [VARIABLE=VALUE...]\n\n" |
4a2a8b5a | 48 | "Notify the init system about service status updates.\n\n" |
6624768c | 49 | " -h --help Show this help\n" |
9aac0b2c | 50 | " --version Show package version\n" |
6624768c LP |
51 | " --ready Inform the init system about service start-up completion\n" |
52 | " --pid[=PID] Set main pid of daemon\n" | |
53 | " --status=TEXT Set status text\n" | |
54 | " --booted Returns 0 if the system was booted up with systemd, non-zero otherwise\n" | |
55 | " --readahead=ACTION Controls read-ahead operations\n", | |
4a2a8b5a LP |
56 | program_invocation_short_name); |
57 | ||
58 | return 0; | |
59 | } | |
60 | ||
61 | static int parse_argv(int argc, char *argv[]) { | |
62 | ||
63 | enum { | |
64 | ARG_READY = 0x100, | |
9aac0b2c | 65 | ARG_VERSION, |
4a2a8b5a | 66 | ARG_PID, |
96551bae | 67 | ARG_STATUS, |
6624768c LP |
68 | ARG_BOOTED, |
69 | ARG_READAHEAD | |
4a2a8b5a LP |
70 | }; |
71 | ||
72 | static const struct option options[] = { | |
6624768c | 73 | { "help", no_argument, NULL, 'h' }, |
9aac0b2c | 74 | { "version", no_argument, NULL, ARG_VERSION }, |
6624768c LP |
75 | { "ready", no_argument, NULL, ARG_READY }, |
76 | { "pid", optional_argument, NULL, ARG_PID }, | |
77 | { "status", required_argument, NULL, ARG_STATUS }, | |
78 | { "booted", no_argument, NULL, ARG_BOOTED }, | |
79 | { "readahead", required_argument, NULL, ARG_READAHEAD }, | |
eb9da376 | 80 | {} |
4a2a8b5a LP |
81 | }; |
82 | ||
83 | int c; | |
84 | ||
85 | assert(argc >= 0); | |
86 | assert(argv); | |
87 | ||
88 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) { | |
89 | ||
90 | switch (c) { | |
91 | ||
92 | case 'h': | |
eb9da376 | 93 | return help(); |
4a2a8b5a | 94 | |
9aac0b2c LP |
95 | case ARG_VERSION: |
96 | puts(PACKAGE_STRING); | |
9aac0b2c LP |
97 | puts(SYSTEMD_FEATURES); |
98 | return 0; | |
99 | ||
4a2a8b5a LP |
100 | case ARG_READY: |
101 | arg_ready = true; | |
102 | break; | |
103 | ||
104 | case ARG_PID: | |
105 | ||
106 | if (optarg) { | |
107 | if (parse_pid(optarg, &arg_pid) < 0) { | |
108 | log_error("Failed to parse PID %s.", optarg); | |
109 | return -EINVAL; | |
110 | } | |
111 | } else | |
112 | arg_pid = getppid(); | |
113 | ||
114 | break; | |
115 | ||
116 | case ARG_STATUS: | |
117 | arg_status = optarg; | |
118 | break; | |
119 | ||
96551bae LP |
120 | case ARG_BOOTED: |
121 | arg_booted = true; | |
122 | break; | |
123 | ||
6624768c LP |
124 | case ARG_READAHEAD: |
125 | arg_readahead = optarg; | |
126 | break; | |
127 | ||
4a2a8b5a LP |
128 | case '?': |
129 | return -EINVAL; | |
130 | ||
131 | default: | |
eb9da376 | 132 | assert_not_reached("Unhandled option"); |
4a2a8b5a LP |
133 | } |
134 | } | |
135 | ||
2f02ce40 LP |
136 | if (optind >= argc && |
137 | !arg_ready && | |
138 | !arg_status && | |
139 | !arg_pid && | |
6624768c LP |
140 | !arg_booted && |
141 | !arg_readahead) { | |
2f02ce40 LP |
142 | help(); |
143 | return -EINVAL; | |
144 | } | |
145 | ||
4a2a8b5a LP |
146 | return 1; |
147 | } | |
148 | ||
149 | int main(int argc, char* argv[]) { | |
150 | char* our_env[4], **final_env = NULL; | |
151 | unsigned i = 0; | |
152 | char *status = NULL, *cpid = NULL, *n = NULL; | |
22f4096c | 153 | int r, retval = EXIT_FAILURE; |
4a2a8b5a LP |
154 | |
155 | log_parse_environment(); | |
2396fb04 | 156 | log_open(); |
4a2a8b5a | 157 | |
6c12b52e LP |
158 | r = parse_argv(argc, argv); |
159 | if (r <= 0) { | |
22f4096c | 160 | retval = r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
4a2a8b5a LP |
161 | goto finish; |
162 | } | |
163 | ||
96551bae LP |
164 | if (arg_booted) |
165 | return sd_booted() <= 0; | |
166 | ||
6624768c LP |
167 | if (arg_readahead) { |
168 | if ((r = sd_readahead(arg_readahead)) < 0) { | |
169 | log_error("Failed to issue read-ahead control command: %s", strerror(-r)); | |
170 | goto finish; | |
171 | } | |
172 | } | |
173 | ||
4a2a8b5a LP |
174 | if (arg_ready) |
175 | our_env[i++] = (char*) "READY=1"; | |
176 | ||
177 | if (arg_status) { | |
178 | if (!(status = strappend("STATUS=", arg_status))) { | |
179 | log_error("Failed to allocate STATUS string."); | |
180 | goto finish; | |
181 | } | |
182 | ||
183 | our_env[i++] = status; | |
184 | } | |
185 | ||
186 | if (arg_pid > 0) { | |
de0671ee | 187 | if (asprintf(&cpid, "MAINPID="PID_FMT, arg_pid) < 0) { |
4a2a8b5a LP |
188 | log_error("Failed to allocate MAINPID string."); |
189 | goto finish; | |
190 | } | |
191 | ||
192 | our_env[i++] = cpid; | |
193 | } | |
194 | ||
195 | our_env[i++] = NULL; | |
196 | ||
197 | if (!(final_env = strv_env_merge(2, our_env, argv + optind))) { | |
198 | log_error("Failed to merge string sets."); | |
199 | goto finish; | |
200 | } | |
201 | ||
202 | if (strv_length(final_env) <= 0) { | |
22f4096c | 203 | retval = EXIT_SUCCESS; |
4a2a8b5a LP |
204 | goto finish; |
205 | } | |
206 | ||
207 | if (!(n = strv_join(final_env, "\n"))) { | |
208 | log_error("Failed to concatenate strings."); | |
209 | goto finish; | |
210 | } | |
211 | ||
212 | if ((r = sd_notify(false, n)) < 0) { | |
213 | log_error("Failed to notify init system: %s", strerror(-r)); | |
214 | goto finish; | |
215 | } | |
216 | ||
22f4096c | 217 | retval = r <= 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
4a2a8b5a LP |
218 | |
219 | finish: | |
220 | free(status); | |
221 | free(cpid); | |
222 | free(n); | |
223 | ||
224 | strv_free(final_env); | |
225 | ||
226 | return retval; | |
227 | } |